Retainer for expansion-joint strips



Nov. 17, 1925- 1.. w. ROGERS RETAINER FOR EXPANSION JOINT STRIPS Filed Feb. 1925 'vwantm 4. m/Eaag Quorum Patented No. 17, 1925.

LEWIS w. ROGERS, or criancrom ALABAMA.

"immmna roa' EXPANSIQNJOINT .sr'rur's.

'Application filed February 9, 1925. SerialNo. acne T allwhom it may concern: I

Be it known that I, Lnwis W. ROGERS; a citizenfof the Unitedstates of America, residing at .Clant'on, iinfthe countyof Chilton and State of Alabama, have iiive'nted certain taiiier' for retaining the expansion .joint and retained in tioned and positively held down and re-' new and useful Improvements in R etainers for ExpansionJoint. Strips, of which the I following is a specification. v V Y My invention ,relates' to an improved restrips customarily laid between sections of concrete pavement. I I

In the laying .of pavement, and part cularly concrete pavements, the specifications fi require the interposition at predetermined intervals, or transverse 7 expansion joints which areinow customarily formed by the.

insertion of an elastic or expansion strip of *any suitable material which must be set up place between sections of the pavement,

w v t is obviously desirabl that alpract'ical and GCQIlOlHlQ' means be devised whereby thesejointstrips may. beaccurately posi-' tained in place during the laying ofthe drag plate to spread theconcrete,- and that the retainer should 'be easily withdrawn from the pavement after it hasbeen placed on each sideoflthe expansion joint and re tainer, leaving the joint strip held-positively in, place by reason of its bond with the pave; ment on each sideof it. v

' My invention contemplates the accomplishing of the foregoing objects by the'pro- VlSlOD Of a joint strip retainer formed-of a metalstrip having its upper edge reversely bent so as to provide a continuous shallow top pocket adaptedto receive,.house and hold down the upper edge of the expansion 's'tripto the desired depth, such-plate having a series of slots opening through its bottom so as to allow the paving on :both sides to bondagainst the expansion joint strip and hold it in place when the retainer is .removed. I

My invention further contemplates'novel anchorage means to secure the retainer inv position-and at the same time to be readily removable'and not to interfere with the spreading of the concrete by machinery. I

. .My invention further mounting form plates on'the ends of the plate in These form tainer ready to be pavement and that the retainer means should 'be such "as not to interfere .withfthe free passage thereover of the machine drawn contemplates retainer, such on the side forms and to, s'et the retainer the I pf'oper operating {position plates are disposed to clear the roadway cfog' Myinvention further contemplates the novel details of i men s of parts, which in their. preferred embodiment .only. are illustrated in'the companying drawings, in which construction and arrange the passage of theldr'ag for leveling the concrete surface.

1g. 1 1s a transverse cross-sectional view cross-sectional line 2 2 of Fig- 1.

Fig. 3 is a cross-sectional view taken on' thealihe' of Fig; 1'

a roadway foundationand side forms a perspective detail of a portion I the view being takenfon thej Fig. 4 illustrates a detail one of the anchor pins! Fig. -5 is 'a lngitudinal cross-sectional. view through the laid pavement at a joint,

showing the joint strip in lace-and the re removed? Similar reference numerals refer to simi-' lar parts throughout the drawings.

I have illustrated for laying a cement side forms'2. 1 The separated intosectiqns such 'as 3 andE-(Fig; i

5) by the interposition of expansion joint strips-5 which maybe of any suitable material such as is hereafter found pose.

My invention relates means employed for retaining this strip in place during the" laying of the pavement I and in the preferred embodiment, which ,isshown, the retainer is in the form of a plate' 6, whichis shown pasa single platehaving which when down along its top edge to pro 'ide'a shallow pocket 7 which opens downwardly so as' to receive the upper edge of the retaining strip wit a. snug fit and to hold.the strip down 'in position. This bend in the plate acts to reinforce and stiffen the retainer and .it provides a pocket closed overhead which houses the joint strip and when anchored or set in position, as hereafter described,

used 410w or'wh'ich may be most: desirable for this purparticularly .to the the width of'the roadway to be laid,"but 7 may obviously be made up in sections desired. This .plateis bentover and' my invention in serviee 5 a roadway upon a .foun-' dation 1 between'any conventional type of cement as laid must be of slots 8 opening through the bottom edge,

and acting to give the cement access to the joint strip on the side of the latter towards the retainer. At the ends of the retainer 6-- "I attach angle braces 9 and at intervals lengthwise of the retainer I mount guides 10 forflat retaining or anchor pins 11. These guides are formed .by bent metal plates providing a pocket opentop and bottom for the snug reception of the wide flat retaining pinsll. These pins have heads 12, by means of which they are driven into the foundation to set the retainer plate and they serve as the only anchor means to position the retainer when no side forms are used. These pins can be readily pulled up when it is desired to move the plate.

On the top of the retainer 6 and overhung from each end I mount form plates 14 ofT- bar structure riveted or bolted by means of angles 15 to the ends of the retainer 6 and having an-,.upright web provided with an aperture 16 to receive"a lifting tool which is used when it is desired to lift the retainer and strip it from the finished pavement. This form plate when placed flush with top of side forms forces the joint-to the desired depth, and can be mounted on the retainer to set the top edge of the strip at any desired depth in the pavement.

In operation, the retainer is moved to the desired point on the road, the form plates 14 are setv on the side forms when such are used and the anchor pins 11 are driven through their guides into the foundation,

the joint strip 6 having been first mounted on the retainer with its upper edge in the pocket 7. The concrete is then laid up to the retainer plate on the side opposite the pin guides and then the ne'xt section of concrete is laid on the side with the pin guides. The top of my device is so disposed and its form plates14 so arranged it will present no interference with the-passage over the joint of a dump hopper with a drag attached thereto to spreadthe concrete, the pin slots and pins being submerged enough in the finished tainer device as a whole can be stripped vertically from the pavement, leaving the ex pansion joint stripv 6 held by the pavement on each side and the retainer can then be moved forward and the operation repeated so that by the use of a few inexpensive retainers and practically without the use of hand labor the road joints can be provided as fastasmachinery can lay the pavement, at the same time leaving a perfectly positioned joint.

Though I have described with great particularity the details of the embodiment of the invention herein shown, it is not to be construed that- I am limited thereto, as changes-in arrangement and substitution of equivalents may be made by those skilled in the art Without departing from the invention as defined in the appended claims.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent, is

1. An expansion joint retainer formed of the'downturned edge through the bottom of the plate. I

2. An expansion joint retainer plate with its top edge bent over to form on one side of the plate a shallow pocket closed overhead and adapted to receive and hold in position the upper edge of a joint strip resting on the foundation.

3. A joint retainer plate according to claim 2, which is provided throughout its length below the pocket with slots opening through its bottom edge.

4. .A joint strip retainer comprising a continuous transverse plate having its top edge rolled over to form a continuous shallow narrow pocket adapted to snugly re- .ceive the top edge of a joint strip, said plate having a greater width than said strip and having slots below the pocket'which open through its bottom.

5. A joint retainer plate having mounting means comprising flat anchor pins and correspondingly shaped vertical guides there- 'for attached on one side of the retainer plate and rising substantially to the a top edge thereof.

In testimony whereof I afiix my signature LEWIS W, ROGERS. 

